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    <div class="Section1">
        <h1>
            <span style='font-family: Helvetica; color: black'>NVP API Web Samples Using PHP<o:p></o:p></span></h1>
        <p>
            <span style='font-family: Helvetica; color: black'>This document describes web samples
                that use PHP to send Name-Value Pair (NVP)&nbsp;API requests to a PayPal server.<o:p></o:p></span></p>
        <p>
            <span style='font-family: Helvetica; color: black'>This document contains the following
                sections:<o:p></o:p></span></p>
        <ul type="disc">
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l1 level1 lfo1; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#requiredsoftware">Required Software</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l1 level1 lfo1; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#installation">Installing the Samples</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l1 level1 lfo1; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#runningsamples">Running the Samples</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l1 level1 lfo1; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#enablingproxy">Enabling the Proxy for Samples</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l1 level1 lfo1; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#sampledescription">Descriptions of Samples</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l1 level1 lfo1; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#APIDocumentation">API&nbsp;Documentation</a><o:p></o:p></span></li>
        </ul>
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            <span style='font-family: Helvetica; color: black'>
                <hr size="2" width="100%" align="center">
            </span>
        </div>
        <h2>
            <span style='font-family: Helvetica; color: black'>Required Software<a name="requiredsoftware"
                id="requiredsoftware"></a><o:p></o:p></span></h2>
        <p>
            <span style='font-family: Helvetica; color: black'>The following software is required:<o:p></o:p></span></p>
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            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
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                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Software<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Version<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Download Location<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>PHP with CURL extension enabled<o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>4.4.2 or greater<o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'><a href="http://www.php.net/downloads.php"
                            target="_blank">http://www.php.net/downloads.php</a><o:p></o:p></span></p>
                </td>
            </tr>
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                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Apache HTTP Server<o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>1.3.17 or greater<o:p></o:p></span></p>
                </td>
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                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'><a href="http://httpd.apache.org/"
                            target="_blank">http://httpd.apache.org/</a><o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>You must install and configure PHP
                with the Apache HTTP Server.<o:p></o:p></span></p>
        <div class="MsoNormal" align="center" style='text-align: center'>
            <span style='font-family: Helvetica; color: black'>
                <hr size="2" width="100%" align="center">
            </span>
        </div>
        <h2>
            <span style='font-family: Helvetica; color: black'>Installing the Samples<a name="installation"
                id="installation"></a><o:p></o:p></span></h2>
        <p>
            <span style='font-family: Helvetica; color: black'>Copy the sample folder, </span>
            <code><span style='font-size: 10.0pt; color: black'>php_nvp_samples</span></code><span
                style='font-family: Helvetica; color: black'>, to the docroot of the Apache HTTP
                Server. By default docroot is in <em><span style='font-family: Helvetica'>datadir</span></em></span><code><span
                    style='font-size: 10.0pt; color: black'>/htdocs</span></code><span style='font-family: Helvetica;
                        color: black'>.<o:p></o:p></span></p>
        <div class="MsoNormal" align="center" style='text-align: center'>
            <span style='font-family: Helvetica; color: black'>
                <hr size="2" width="100%" align="center">
            </span>
        </div>
        <h2>
            <span style='font-family: Helvetica; color: black'>Running the Samples<a name="runningsamples"
                id="runningsamples"></a><o:p></o:p></span></h2>
        <p>
            <span style='font-family: Helvetica; color: black'>First, make sure that you have installed
                the <a href="#requiredsoftware">required software</a> and the <a href="#installation">
                    samples</a>.<o:p></o:p></span></p>
        <p>
            <span style='font-family: Helvetica; color: black'>You can run the samples by entering
                the following address in a web browser:<o:p></o:p></span></p>
        <pre><span style='color: black'>http://<em><span style='font-family: "Courier New"'>name_of_Apache_HTTP_Server:port</span></em>/php_nvp_samples/index.html<o:p></o:p></span></pre>
        <div class="MsoNormal" align="center" style='text-align: center'>
            <span style='font-family: Helvetica; color: black'>
                <hr size="2" width="100%" align="center">
            </span>
        </div>
        <h2>
            <span style='font-family: Helvetica; color: black'>Enabling the Proxy for Samples<a
                name="enablingproxy" id="enablingproxy"></a><o:p></o:p></span></h2>
        <p>
            <span style='font-family: Helvetica; color: black'><a href="#constants">constants.php</a>
                is the configuration file for Proxy setup.<o:p></o:p></span></p>
        <p>
            <span style='font-family: Helvetica; color: black'>Update the following variables in
                <a href="#constants">constants.php</a> for Proxy configuration.<o:p></o:p></span></p>
        <ul type="disc">
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l0 level1 lfo2; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    USE_PROXY&nbsp;&nbsp;&nbsp; - Set this variable to TRUE to route all the API requests
                    through Proxy(by default it is FALSE).<o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l0 level1 lfo2; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    PROXY_HOST - Set this variable to Proxy Server name or IP address
                    <o:p>
                    </o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l0 level1 lfo2; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    PROXY_PORT - Set this variable to Proxy Server port
                    <o:p>
                    </o:p></span></li>
        </ul>
        <h2>
            <span style='font-family: Helvetica; color: black'>Descriptions of Samples<a name="sampledescription"
                id="sampledescription"></a><o:p></o:p></span></h2>
        <p>
            <span style='font-family: Helvetica; color: black'>The web samples consist of the following:<o:p></o:p></span></p>
        <ul type="disc">
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#directpayment">Charging a Credit Card Using Direct Payment</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#expresscheckout">Accepting PayPal in Express Checkout</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#capture">Capturing the amount of the authorization </a>
                    <o:p>
                    </o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#void">Void the authorization</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#reauthorization">Reauthorizing for a different amount</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#transactiondetails">Getting Transaction Details</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#transactionsearch">Searching for a Transaction</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#refundtransaction">Refunding the amount</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#masspay">Mass Payment</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#recurringpayments">Recurring Payments</a><o:p></o:p></span></li>
            <li class="MsoNormal" style='color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;
                mso-list: l2 level1 lfo3; tab-stops: list .5in'><span style='font-family: Helvetica'>
                    <a href="#commonfiles">Common Files</a><o:p></o:p></span></li>
        </ul>
        <p>
            <span style='font-family: Helvetica; color: black'>The main page of the samples, <a
                href="#index">index.html</a>, contains links to each sample.<o:p></o:p></span></p>
        <h3>
            <span style='font-family: Helvetica; color: black'>Charging a Credit Card Using Direct
                Payment<a name="directpayment" id="directpayment"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use Direct
                Payment to charge a credit card. Access this sample from the following choices displayed
                on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>DoDirectPayment -
                            <st1:city w:st="on">
                                <st1:place w:st="on">Sale</st1:place>
                            </st1:city></span></strong><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Charge a credit card.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>In the </span><code><span style='font-size: 10.0pt;
                            color: black'>DoDirectPayment</span></code><span style='font-family: Helvetica; color: black'>
                                request, the </span><code><span style='font-size: 10.0pt; color: black'>PAYMENTACTION</span></code><span
                                    style='font-family: Helvetica; color: black'> parameter is set to </span>
                        <st1:city w:st="on">
                            <st1:place w:st="on">
                                <code><span style='font-size: 10.0pt; color: black'>Sale</span></code></st1:place>
                        </st1:city><span style='font-family: Helvetica; color: black'>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>DoDirectPayment - Authorization</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Authorize a credit card for later
                            sale.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>In the </span><code><span style='font-size: 10.0pt;
                            color: black'>DoDirectPayment</span></code><span style='font-family: Helvetica; color: black'>
                                request, the </span><code><span style='font-size: 10.0pt; color: black'>PAYMENTACTION</span></code><span
                                    style='font-family: Helvetica; color: black'> parameter is set to </span>
                        <code><span style='font-size: 10.0pt; color: black'>Authorization</span></code><span
                            style='font-family: Helvetica; color: black'>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoDirectPayment.php</span></code><a
                            name="DoDirectPayment" id="DoDirectPayment"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main web page for the
                            DoDirectPayment sample. This page allows the user to enter name, address, amount,
                            and credit card information. It also accept input variable </span><code><span style='font-size: 10.0pt;
                                color: black'>paymentType</span></code><span style='font-family: Helvetica; color: black'>
                                    which becomes the value of the </span><code><span style='font-size: 10.0pt; color: black'>
                                        PAYMENTACTION</span></code><span style='font-family: Helvetica; color: black'>&nbsp;parameter.
                                            <o:p>
                                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>When the user clicks the <strong>
                            <span style='font-family: Helvetica'>Submit</span></strong> button, DoDirectPaymentReceipt.php
                            is called.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls&nbsp;<a href="#DoDirectPaymentReceipt">DoDirectPaymentReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoDirectPaymentReceipt.php</span></code><a
                            name="DoDirectPaymentReceipt" id="DoDirectPaymentReceipt"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Submits a credit card transaction
                            to PayPal using a </span><code><span style='font-size: 10.0pt; color: black'>DoDirectPayment</span></code><span
                                style='font-family: Helvetica; color: black'> request.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code collects transaction parameters
                            from the form displayed by DoDirectPayment.php then constructs and sends the </span>
                        <code><span style='font-size: 10.0pt; color: black'>DoDirectPayment</span></code><span
                            style='font-family: Helvetica; color: black'>&nbsp;request string to the PayPal
                            server. The </span><code><span style='font-size: 10.0pt; color: black'>paymentType</span></code><span
                                style='font-family: Helvetica; color: black'> variable becomes the </span>
                        <code><span style='font-size: 10.0pt; color: black'>PAYMENTACTION</span></code><span
                            style='font-family: Helvetica; color: black'>&nbsp;parameter of the request string.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After the PayPal server returns the
                            response, the code displays the API request and response in the browser. If the
                            response from PayPal was a success, it displays the response parameters. If the
                            response was an error, it displays the errors in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoDirectPayment">
                            DoDirectPayment.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>
                            and <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>Accepting PayPal in Express Checkout<a
                name="expresscheckout" id="expresscheckout"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use Express
                Checkout to accept payments using PayPal. Access this sample from the following
                choices displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>ExpressCheckout - Sale</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Do basic checkout with PayPal.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>In the </span><code><span style='font-size: 10.0pt;
                            color: black'>SetExpressCheckout</span></code><span style='font-family: Helvetica;
                                color: black'> request, the </span><code><span style='font-size: 10.0pt; color: black'>
                                    PAYMENTACTION</span></code><span style='font-family: Helvetica; color: black'> parameter
                                        is set to </span><code><span style='font-size: 10.0pt; color: black'>Sale</span></code><span
                                            style='font-family: Helvetica; color: black'>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>ExpressCheckout - Authorization</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Authorize for a single capture.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>In the </span><code><span style='font-size: 10.0pt;
                            color: black'>SetExpressCheckout</span></code><span style='font-family: Helvetica;
                                color: black'> request, the </span><code><span style='font-size: 10.0pt; color: black'>
                                    PAYMENTACTION</span></code><span style='font-family: Helvetica; color: black'> parameter
                                        is set to </span><code><span style='font-size: 10.0pt; color: black'>Authorization</span></code><span
                                            style='font-family: Helvetica; color: black'>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>ExpressCheckout - Order</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Authorize for multiple captures.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>In the </span><code><span style='font-size: 10.0pt;
                            color: black'>SetExpressCheckout</span></code><span style='font-family: Helvetica;
                                color: black'> request, the </span><code><span style='font-size: 10.0pt; color: black'>
                                    PAYMENTACTION</span></code><span style='font-family: Helvetica; color: black'> parameter
                                        is set to </span><code><span style='font-size: 10.0pt; color: black'>Order</span></code><span
                                            style='font-family: Helvetica; color: black'>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>SetExpressCheckout.php</span></code><a
                            name="SetExpressCheckout" id="SetExpressCheckout"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main web page for the
                            Express Checkout sample. The page allows the user to enter amount and currency type.
                            It also accept input variable </span><code><span style='font-size: 10.0pt; color: black'>
                                paymentType</span></code><span style='font-family: Helvetica; color: black'> which becomes
                                    the value of the </span><code><span style='font-size: 10.0pt; color: black'>PAYMENTACTION</span></code><span
                                        style='font-family: Helvetica; color: black'>&nbsp;parameter.
                                        <o:p>
                                        </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>When the user clicks the <strong>
                            <span style='font-family: Helvetica'>Submit</span></strong> button, ReviewOrder.php
                            is called.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#ReviewOrder">ReviewOrder.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>ReviewOrder.php</span></code><a
                            name="ReviewOrder" id="ReviewOrder"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This file is called after the user
                            clicks on a button during the checkout process to use PayPal's Express Checkout.
                            The user logs in to their PayPal account.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>This file is called twice.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>On the first pass, the code executes
                            the if statement:<o:p></o:p></span></p>
                    <pre><span style='color: black'>if (! isset ($token))<o:p></o:p></span></pre>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code collects transaction parameters
                            from the form displayed by SetExpressCheckout.php then constructs and sends a </span>
                        <code><span style='font-size: 10.0pt; color: black'>SetExpressCheckout</span></code><span
                            style='font-family: Helvetica; color: black'> request string to the PayPal server.
                            The </span><code><span style='font-size: 10.0pt; color: black'>paymentType</span></code><span
                                style='font-family: Helvetica; color: black'> variable becomes the </span>
                        <code><span style='font-size: 10.0pt; color: black'>PAYMENTACTION</span></code><span
                            style='font-family: Helvetica; color: black'>&nbsp;parameter of the request string.
                            The </span><code><span style='font-size: 10.0pt; color: black'>RETURNURL</span></code><span
                                style='font-family: Helvetica; color: black'> parameter is set to this file; this
                                is how ReviewOrder.php is called twice.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>On the second pass, the code executes
                            the else statement.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>On the first pass, the buyer completed
                            the authorization in their PayPal account; now the code gets the payer details by
                            sending a </span><code><span style='font-size: 10.0pt; color: black'>GetExpressCheckoutDetails</span></code><span
                                style='font-family: Helvetica; color: black'> request to the PayPal server. Then
                                the code calls GetExpressCheckoutDetails.php.<o:p></o:p></span></p>
                    <p>
                        <b><span style='font-family: Helvetica; color: red'>Note:</span></b><span style='font-family: Helvetica;
                            color: black'>&nbsp;Be sure to check the value of </span><code><span style='font-size: 10.0pt;
                                color: black'>PAYPAL_URL</span></code><span style='font-family: Helvetica; color: black'>.
                                    The buyer is sent to this URL to authorize payment with their PayPal account. For
                                    testing purposes, this should be set to the PayPal sandbox.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#SetExpressCheckout">
                            SetExpressCheckout.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#GetExpressCheckoutDetails">
                            GetExpressCheckoutDetails.php</a>, <a href="#CallerService">CallerService.php</a>,
                            and <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 3'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>GetExpressCheckoutDetails.php</span></code><a
                            name="GetExpressCheckoutDetails" id="GetExpressCheckoutDetails"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p>
                        <span style='font-family: Helvetica; color: black'>This functionality is called after
                            the buyer returns from PayPal and has authorized the payment.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Displays the payer details returned
                            by the </span><code><span style='font-size: 10.0pt; color: black'>GetExpressCheckoutDetails</span></code><span
                                style='font-family: Helvetica; color: black'> response and calls DoExpressCheckoutPayment.php
                                to complete the payment authorization.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#ReviewOrder">
                            ReviewOrder.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#ECReceipt">DoExpressCheckoutPayment.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 4; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoExpressCheckoutPayment.php</span></code><a
                            name="ECReceipt" id="ECReceipt"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This functionality is called to complete
                            the payment with PayPal and display the result to the buyer.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code constructs and sends the
                        </span><code><span style='font-size: 10.0pt; color: black'>DoExpressCheckoutPayment</span></code><span
                            style='font-family: Helvetica; color: black'> request string to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#GetExpressCheckoutDetails">
                            GetExpressCheckoutDetails.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>Getting Transaction Details<a
                name="TransactionDetails" id="transactiondetails"><o:p></o:p></a></span></h3>
        <p>
            <span style='mso-bookmark: TransactionDetails'><span style='font-family: Helvetica;
                color: black'>This sample shows how to use the </span></span><span style='mso-bookmark: TransactionDetails'>
                    <code><span style='font-size: 10.0pt; color: black'>GetTransactionDetails</span></code></span><span
                        style='mso-bookmark: TransactionDetails'><span style='font-family: Helvetica; color: black'>
                            request. Access this sample from the following choice displayed on index.html:<o:p></o:p></span></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>GetTransactionDetails</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Gets transaction details for a specific
                            transaction ID.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays a text box
                            where the user enters a transaction ID. When the user clicks the <strong><span style='font-family: Helvetica'>
                                Submit</span></strong> button, the code constructs an NVP&nbsp;API request to
                        </span><code><span style='font-size: 10.0pt; color: black'>GetTransactionDetails</span></code><span
                            style='font-family: Helvetica; color: black'> and sends it to the PayPal server.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='mso-bookmark: TransactionDetails'><span style='font-family: Helvetica;
                color: black'>The primary files for this sample are:<o:p></o:p></span></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>GetTransactionDetails.html</span></code><a
                            name="GetTransactionDetails" id="GetTransactionDetails"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for GetTransactionDetails
                            sample. This page displays a text box where the user enters a transaction ID and
                            a <strong><span style='font-family: Helvetica'>Submit</span></strong> button that
                            calls TransactionDetails.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#TransactionDetails">
                            TransactionDetails.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>TransactionDetails.php</span></code><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>GetTransactionDetails</span></code><span style='font-family: Helvetica;
                                color: black'> NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the transaction
                            ID and constructs the NVP API&nbsp;request&nbsp;string to send to the PayPal server.
                            The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#GetTransactionDetails">
                            GetTransactionDetails.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <span style='mso-bookmark: TransactionDetails'></span>
        <h3>
            <span style='font-family: Helvetica; color: black'>DoCapture<a name="capture" id="capture"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use the
            </span><code><span style='font-size: 10.0pt; color: black'>DoCapture</span></code><span
                style='font-family: Helvetica; color: black'> request. Access this sample from the
                following choice displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>DoCapture</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Settle an order or previously authorized
                            transaction and obtain payment for either the complete amount or any portion of
                            it.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays text boxes
                            where the user enters a authorization ID,amount,invoice ID and drop downs where
                            the user can select completecodetype,currency code. When the user clicks the <strong>
                                <span style='font-family: Helvetica'>Submit</span></strong> button, the code
                            constructs an NVP&nbsp;API request to </span><code><span style='font-size: 10.0pt;
                                color: black'>DoCapture</span></code><span style='font-family: Helvetica; color: black'>
                                    and sends it to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <b><span style='font-family: Helvetica; color: red'>Note:</span></b><span style='font-family: Helvetica;
                            color: black'> DoCapture request is for use with both basic and order authorizations.
                            <o:p>
                            </o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoCapture.php</span></code><a
                            name="DoCapture" id="DoCapture"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for DoCapture
                            sample. This page displays text boxes where the user enters a authorization ID,amount,invoice
                            ID and drop down boxes where the user can select completecodetype,currency code.
                            When the user clicks the <strong><span style='font-family: Helvetica'>Submit</span></strong>
                            button that calls DoCaptureReceipt.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#DoCaptureReceipt">
                            DoCaptureReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoCaptureReceipt.php</span></code><a
                            name="DoCaptureReceipt" id="DoCaptureReceipt"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>DoCapture</span></code><span style='font-family: Helvetica; color: black'>
                                NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the authorization
                            ID,amount,invoice ID,completecodetype,currency code and constructs the NVP API&nbsp;request&nbsp;string
                            to send to the PayPal server. The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoCapture">DoCapture.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>DoVoid<a name="void" id="void"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use the
            </span><code><span style='font-size: 10.0pt; color: black'>DoVoid</span></code><span
                style='font-family: Helvetica; color: black'> request. Access this sample from the
                following choice displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>DoVoid</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Void the authorization, if you need
                            to cancel the transaction.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays text boxes
                            where the user enters a authorization ID. When the user clicks the <strong><span
                                style='font-family: Helvetica'>Submit</span></strong> button, the code constructs
                            an NVP&nbsp;API request to </span><code><span style='font-size: 10.0pt; color: black'>
                                DoVoid</span></code><span style='font-family: Helvetica; color: black'> and sends it
                                    to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <b><span style='font-family: Helvetica; color: red'>IMPORTANT:</span></b><span style='font-family: Helvetica;
                            color: black'> The AuthorizationID value on DoVoid request must be the original
                            authorization identification number, not the value of AuthorizationID returned by
                            DoReauthorizationResponse.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>By definition, when the authorization
                            period expires, the authorization or reauthorization of a transaction is implicitly
                            voided.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <b><span style='font-family: Helvetica; color: red'>Note:</span></b><span style='font-family: Helvetica;
                            color: black'> DoVoid request is for use with both basic and order authorizations.
                            <o:p>
                            </o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoVoid.php</span></code><a name="DoVoid"
                            id="DoVoid"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for DoCapture
                            sample. This page displays text boxe where the user enters a authorization ID. When
                            the user clicks the <strong><span style='font-family: Helvetica'>Submit</span></strong>
                            button that calls DoCaptureReceipt.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#DoVoidReceipt">DoVoidReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoVoidReceipt.php</span></code><a
                            name="DoVoidReceipt" id="DoVoidReceipt"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>DoVoid</span></code><span style='font-family: Helvetica; color: black'>
                                NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the authorization
                            ID and constructs the NVP API&nbsp;request&nbsp;string to send to the PayPal server.
                            The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoVoid">DoVoid.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>DoReauthorization<a name="reauthorization"
                id="reauthorization"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use the
            </span><code><span style='font-size: 10.0pt; color: black'>DoReauthorization</span></code><span
                style='font-family: Helvetica; color: black'> request. Access this sample from the
                following choice displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>DoReauthorization</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Reauthorize for a different amount:
                            You can reauthorize for up to 115% of the originally authorized amount, not to exceed
                            an increase of $75 USD.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays text boxes
                            where the user enters a authorization ID,amount and a drop down where the user can
                            select currency code. When the user clicks the <strong><span style='font-family: Helvetica'>
                                Submit</span></strong> button, the code constructs an NVP&nbsp;API request to
                        </span><code><span style='font-size: 10.0pt; color: black'>DoReauthorization</span></code><span
                            style='font-family: Helvetica; color: black'> and sends it to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>To use DoReauthorization you must
                            have previously authorized a transaction.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <b><span style='font-family: Helvetica; color: red'>Note:</span></b><span style='font-family: Helvetica;
                            color: black'> DoReauthorizationRequest is for use only with basic authorizations,
                            not order authorizations.
                            <o:p>
                            </o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoReauthorization.html</span></code><a
                            name="DoReauthorization" id="DoReauthorization"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for DoReauthorization
                            sample. This page displays text boxes where the user enters a authorization ID,amount
                            and drop down where the user can select currency code. When the user clicks the
                            <strong><span style='font-family: Helvetica'>Submit</span></strong> button that
                            calls DoReauthorizationReceipt.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#ReauthorizationReceipt">
                            DoReauthorizationReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>DoReauthorizationReceipt.php</span></code><a
                            name="ReauthorizationReceipt" id="ReauthorizationReceipt"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>DoReauthorization</span></code><span style='font-family: Helvetica;
                                color: black'> NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the authorization
                            ID,amount,currency code and constructs the NVP API&nbsp;request&nbsp;string to send
                            to the PayPal server. The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoReauthorization">
                            DoReauthorization.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>TransactionSearch<a name="transactionsearch"
                id="transactionsearch"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use the
            </span><code><span style='font-size: 10.0pt; color: black'>TransactionSearch</span></code><span
                style='font-family: Helvetica; color: black'> request. Access this sample from the
                following choice displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>TransactionSearch</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Searching for a transaction.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays text boxes
                            where the user enters a startdate,enddate and Transaction ID. When the user clicks
                            the <strong><span style='font-family: Helvetica'>Submit</span></strong> button,
                            the code constructs an NVP&nbsp;API request to </span><code><span style='font-size: 10.0pt;
                                color: black'>TransactionSearch</span></code><span style='font-family: Helvetica;
                                    color: black'> and sends it to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>With TransactionSearch request, you
                            must always set the StartDate for your search.The effect of setting other elements
                            is additive or can alter the search criteria.TransactionSearch response returns
                            up to 100 exact matches.
                            <o:p>
                            </o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>TransactionSearch.php</span></code><a
                            name="DoTransactionSearch" id="DoTransactionSearch"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for TransactionSearch
                            sample. This page displays text boxes where the user enters startdate,enddate and
                            transaction ID. When the user clicks the <strong><span style='font-family: Helvetica'>
                                Submit</span></strong> button that calls TransactionSearchResults.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#TransactionSearchResults">
                            TransactionSearchResults.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>TransactionSearchResults.php</span></code><a
                            name="TransactionSearchResults" id="TransactionSearchResults"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>TransactionSearch</span></code><span style='font-family: Helvetica;
                                color: black'> NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the startdate,enddate,transaction
                            ID and constructs the NVP API&nbsp;request&nbsp;string to send to the PayPal server.
                            The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoTransactionSearch">
                            TransactionSearch.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>RefundTransaction<a name="refundtransaction"
                id="refundtransaction"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use the
            </span><code><span style='font-size: 10.0pt; color: black'>RefundTransaction</span></code><span
                style='font-family: Helvetica; color: black'> request. Access this sample from the
                following choice displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>RefundTransaction</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Use the RefundTransaction API to
                            make either full or partial refunds.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays text boxes
                            where the user enters a transaction ID,amount and drop downs where the user can
                            select refund type,currency code. When the user clicks the <strong><span style='font-family: Helvetica'>
                                Submit</span></strong> button, the code constructs an NVP&nbsp;API request to
                        </span><code><span style='font-size: 10.0pt; color: black'>RefundTransaction</span></code><span
                            style='font-family: Helvetica; color: black'> and sends it to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>With RefundTransaction request, you
                            must always pass the values of Transaction ID and RefundType. If RefundType is set
                            to Full, you must not set Amount; however, if RefundType is Partial, you must set
                            Amount.
                            <o:p>
                            </o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>RefundTransaction.php</span></code><a
                            name="DoRefundTransaction" id="DoRefundTransaction"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for RefundTransaction
                            sample. This page displays text boxes where the user enters a transaction ID,amount
                            and drop downs where the user can select refund type,currency code. When the user
                            clicks the <strong><span style='font-family: Helvetica'>Submit</span></strong> button
                            that calls RefundReceipt.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#RefundReceipt">RefundReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style="padding: 3.75pt 3.75pt 3.75pt 3.75pt; height: 215px;">
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>RefundReceipt.php</span></code><a
                            name="RefundReceipt" id="RefundReceipt"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style="padding: 3.75pt 3.75pt 3.75pt 3.75pt; height: 215px;">
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>RefundTransaction</span></code><span style='font-family: Helvetica;
                                color: black'> NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the transaction
                            ID,amount,refund type,currency code and constructs the NVP API&nbsp;request&nbsp;string
                            to send to the PayPal server. The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoRefundTransaction">
                            RefundTransaction.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>MassPay<a name="masspay" id="masspay"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>This sample shows how to use the
            </span><code><span style='font-size: 10.0pt; color: black'>MassPay</span></code><span
                style='font-family: Helvetica; color: black'> request. Access this sample from the
                following choice displayed on index.html:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica; color: black'>MassPay</span></strong><span
                            style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>The MassPay API is the programmatic
                            counterpart to the Mass Payment feature available through the PayPal website. You
                            can include up to 250 payments per MassPay request.The MassPay API triggers the
                            sending of an Instant Payment Notification email to the recipient of the funds.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The main page displays text boxes
                            where the user enters a emailsubject,receivertype,receiver email,amount,unique ID,note
                            and drop down where the user can select currency code. When the user clicks the
                            <strong><span style='font-family: Helvetica'>Submit</span></strong> button, the
                            code constructs an NVP&nbsp;API request to </span><code><span style='font-size: 10.0pt;
                                color: black'>MassPay</span></code><span style='font-family: Helvetica; color: black'>
                                    and sends it to the PayPal server.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>You must have a PayPal balance in
                            each currency in which you want to make a payment and have sufficient funds to cover
                            the entire Mass Payment amount and fee. You cannot mix currencies in the same MassPayRequest;
                            a separate request is required for each currency.
                            <o:p>
                            </o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica; color: black'>The primary files for this sample
                are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>MassPay.html</span></code><a
                            name="DoMassPay" id="DoMassPay"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the main page for MassPay
                            sample. This page displays text boxes where the user enters a emailsubject, recievertype,reciever
                            email,amount,unique ID,note and drop down where the user can select currency code.
                            When the user clicks the <strong><span style='font-family: Helvetica'>Submit</span></strong>
                            button that calls MassPayReceipt.php.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by&nbsp;<a href="#index">index.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#MassPayReceipt">MassPayReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>MassPayReceipt.php</span></code><a
                            name="MassPayReceipt" id="MassPayReceipt"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Sends a </span><code><span style='font-size: 10.0pt;
                            color: black'>MassPay</span></code><span style='font-family: Helvetica; color: black'>
                                NVP&nbsp;API&nbsp;request to PayPal.
                                <o:p>
                                </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>The code retrieves the emailsubject,recievertype,reciever
                            email,amount,unique ID,note,currency code and constructs the NVP API&nbsp;request&nbsp;string
                            to send to the PayPal server. The request to PayPal uses an API&nbsp;Signature.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>After receiving the response from
                            the PayPal server, the code displays the request and response in the browser. If
                            the response was a success, it displays the response parameters. If the response
                            was an error, it displays the errors received in APIError.php.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoMassPay">MassPay.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica'>Recurring Payments<a name="recurringpayments"
                id="recurringpayment"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica'>This sample shows how to use Recurring payments.
                Access this sample from the following choices displayed on RecurringPayments\RecurringPayments.php
                page, link for this page is available in index.html file
                <o:p>
                </o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica'>Create Recurring Payments Profile </span>
                        </strong><span style='font-family: Helvetica'>
                            <o:p>
                            </o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>creating profile for making recurring payments<o:p></o:p></span></p>
                    </p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica'>Manage Recurring Payments Profile Status
                        </span></strong><span style='font-family: Helvetica'>
                            <o:p>
                            </o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>After creating Recurring payment profile its status
                            can be changed to cancel, suspend, reactivate<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica'>Get Recurring Payments Profile Details
                        </span></strong><span style='font-family: Helvetica'>
                            <o:p>
                            </o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>After creating reurring payment profile, profile
                            Id will be received which can be used to get the details about the profile<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2; mso-yfti-lastrow: yes'>
                <td valign="top" style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <strong><span style='font-family: Helvetica'>Bill Outstanding Amount</span></strong><span
                            style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>Bill the buyer for the outstanding balance associated
                            with a recurring payments profile<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <p>
            <span style='font-family: Helvetica'>The primary files for this sample are:<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>RecurringPayments/RecurringPayments.php</span></code><a
                            name="recurringpaymentIndex" id="recurringpaymentIndex"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This page contains the link for create recurringpayments,
                            Manage recurring payments, Get recurring payment Profile details,Bill outstanding
                            amount</span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by&nbsp;<a href="#index">Index.html</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>CreateRPProfile.php</span></code><a name="RPcreateProfile"
                            id="RPcreateProfile"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This page allows the user to enter necessary details
                            to create recurring payment profile like first name, last name, card details, profile
                            description and billing address</span></p>
                    <p>
                        <span style='font-family: Helvetica'>When the user clicks the <strong><span style='font-family: Helvetica'>
                            Submit</span></strong> button, CreateRPProfileReceipt.php page is called.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by&nbsp;<a href="#recurringpaymentIndex">RecurringPayments/RecurringPayments.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#rpProfile">CreateRPProfileReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>CreateRPProfileReceipt.php</span></code><a name="rpProfile"
                            id="rpProfile"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This file is called after the user clicks on the
                            submit button in CreateRPProfile.php page<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>The code collects transaction parameters from the
                            form displayed by CreateRPProfile.php then constructs and sends a </span><code><span
                                style='font-size: 10.0pt'>CreateRecurringPaymentsProfile</span></code><span style='font-family: Helvetica'>
                                    request string to the PayPal server then a recurring payment profile is created
                                    and the server returns the profile Id and its description.</span></code></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by <a href="#RPcreateProfile">CreateRPProfile.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#CallerService">CallerService.php</a>
                            and <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>GetRPProfileDetails.html</span></code><a name="RPgetProfileDetails"
                            id="RPgetProfileDetails"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This page allows the user to enter recurring payment
                            profile ID so that he can see the entire profile details of that profile Id</span></p>
                    <p>
                        <span style='font-family: Helvetica'>When the user clicks the <strong><span style='font-family: Helvetica'>
                            Submit</span></strong> button, GetRPProfileDetails.php page is called.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by&nbsp;<a href="#recurringpaymentIndex">RecurringPayments/RecurringPayments.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#RPprofileDetails">GetRPProfileDetails.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>GetRPProfileDetails.php</span></code><a name="RPprofileDetails"
                            id="RPprofileDetails"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This file is called after the user clicks on the
                            submit button in GetRPProfileDetails.html page<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>The code gets the profile ID from GetRPProfileDetails.html
                            page then constructs and sends a </span><code><span style='font-size: 10.0pt'>GetRecurringPaymentsProfileDetails</span></code><span
                                style='font-family: Helvetica'> request string to the PayPal server then server
                                returns entire profile details.</span></code></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by <a href="#RPgetProfileDetails">GetRPProfileDetails.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#CallerService">CallerService.php</a>
                            and <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 3'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>ManageRPProfileStatus.html</span></code><a name="RPmanageProfile"
                            id="RPmanageProfile"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p>
                        <span style='font-family: Helvetica'>This page is used to manage the existing recurring
                            payment Profiles,
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>we can cancel, suspend or reactivate a profile</span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by <a href="#recurringpaymentIndex"></a>.<o:p>RecurringPayments/RecurringPayments.php</o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#RPmanageProfileStatus">ManageRPProfileStatus.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 4; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>ManageRPProfileStatus.php</span></code><a name="RPmanageProfileStatus"
                            id="RPmanageProfileStatus"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This file is called after the user clicks on the
                            submit button in ManageRPProfileStatus.html page
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>The code constructs and sends the </span><code>
                            <span style='font-size: 10.0pt'>ManageRecurringPaymentsProfileStatus</span></code><span
                                style='font-family: Helvetica'> request string to the PayPal server<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by <a href="#RPmanageProfile">ManageRPProfileStatus.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 3'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>BillOutstandingAmount.html</span></code><a name="BillOutStandingAmt"
                            id="BillOutStandingAmt"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p>
                        <span style='font-family: Helvetica'>This page is used to Bill the buyer for the outstanding
                            balance associated with a recurring payments profile<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Profile Id and outstanding bill amount should be
                            given as input in this page</span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by <a href="#recurringpaymentIndex">RecurringPayments/RecurringPayments.php</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#OutstandingAmtReceipt">BillOutstandingAmount.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 4; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt'>BillOutstandingAmount.php</span></code><a name="OutstandingAmtReceipt"
                            id="OutstandingAmtReceipt"></a><span style='font-family: Helvetica'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica'>This file is called after the user clicks on the
                            submit button in BillOutstandingAmount.html page
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>The code constructs and sends the </span><code>
                            <span style='font-size: 10.0pt'>BillOutstandingAmount</span></code><span style='font-family: Helvetica'>
                                request string to the PayPal server<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Called by <a href="#BillOutStandingAmt">BillOutstandingAmount.html</a>.<o:p></o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica'>Calls <a href="#CallerService">CallerService.php</a>and
                            <a href="#ApiError">APIError.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <h3>
            <span style='font-family: Helvetica; color: black'>Common Files<a name="commonfiles"
                id="commonfiles"></a><o:p></o:p></span></h3>
        <p>
            <span style='font-family: Helvetica; color: black'>The following files are common to
                the samples.<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>File<o:p></o:p></span></b></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal" align="center" style='text-align: center'>
                        <b><span style='font-family: Helvetica; color: black'>Description<o:p></o:p></span></b></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 1'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p>
                        <code><span style='font-size: 10.0pt; color: black'>index.html</span></code><a name="index"
                            id="index"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>The main web page with links to each
                            sample.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#DoDirectPayment">
                            DoDirectPayment.php</a>, <a href="#SetExpressCheckout">SetExpressCheckout.php</a>,
                            and <a href="#GetTransactionDetails">GetTransactionDetails.html</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 2'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>sdk.css</span></code><span style='font-family: Helvetica;
                            color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Cascading Style Sheet (CSS) used
                            by index.html.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 3'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>CallerService.php</span></code><a
                            name="CallerService" id="CallerService"></a><span style='font-family: Helvetica;
                                color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Each API uses this page to submit
                            NVPRequest.<o:p></o:p></span></p>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This Page reads the credential information
                            from constants.php to connect with Server, submit NVPRequest and
                            <br>
                            return NVPResponse from the Server after de-formatting to display in response page.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Calls <a href="#constants">constants.php</a>
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#TransactionDetails">
                            TransactionDetails.php</a>, <a href="#ReviewOrder">ReviewOrder.php</a>,<a href="#ECReceipt">DoExpressCheckoutPayment.php</a>
                            and <a href="#DoDirectPaymentReceipt">DoDirectPaymentReceipt.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 4'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>APIError.php</span></code><a
                            name="ApiError" id="ApiError"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>Displays error parameters from the
                            response in the browser.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#DoDirectPaymentReceipt">
                            DoDirectPaymentReceipt.php</a>,<a href="#TransactionDetails">TransactionDetails.php</a>,<a
                                href="#ReviewOrder">ReviewOrder.php</a>,
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'><a href="#ECReceipt">DoExpressCheckoutPayment.php</a>
                            and <a href="#CallerService">CallerService.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
            <tr style='mso-yfti-irow: 5; mso-yfti-lastrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <code><span style='font-size: 10.0pt; color: black'>constants.php</span></code><a
                            name="constants" id="constants"></a><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>This is the configuration file for
                            the samples.This file contains the parameters needed to make an API call and parameters
                            needed for proxy setup.
                            <o:p>
                            </o:p></span></p>
                    <p>
                        <span style='font-family: Helvetica; color: black'>PayPal includes the following API
                            Signature for making API calls to the PayPal sandbox:<o:p></o:p></span></p>
                    <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
                        mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
                        <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                            <td colspan="2" style='border: none; padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal" align="center" style='text-align: center'>
                                    <span style='font-family: Helvetica; color: black'>API&nbsp;Signature<o:p></o:p></span></p>
                            </td>
                        </tr>
                        <tr style='mso-yfti-irow: 1'>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <span style='font-family: Helvetica; color: black'>API&nbsp;Username<o:p></o:p></span></p>
                            </td>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <code><span style='font-size: 10.0pt; color: black'>sdk-three_api1.sdk.com</span></code><span
                                        style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                            </td>
                        </tr>
                        <tr style='mso-yfti-irow: 2'>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <span style='font-family: Helvetica; color: black'>API&nbsp;Password<o:p></o:p></span></p>
                            </td>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <code><span style='font-size: 10.0pt; color: black'>QFZCWN5HZM8VBG7Q</span></code><span
                                        style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                            </td>
                        </tr>
                        <tr style='mso-yfti-irow: 3; mso-yfti-lastrow: yes'>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <span style='font-family: Helvetica; color: black'>API&nbsp;Signature<o:p></o:p></span></p>
                            </td>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <code><span style='font-size: 10.0pt; color: black'>A-IzJhZZjhg29XQ2qnhapuwxIDzyAZQ92FRP5dqBzVesOkzbdUONzmOU</span></code><span
                                        style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                            </td>
                        </tr>
                    </table>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black; display: none; mso-hide: all'>
                            <o:p>&nbsp;</o:p></span></p>
                    <table class="MsoNormalTable" border="1" cellpadding="0" style='mso-cellspacing: 1.5pt;
                        mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
                        <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                            <td colspan="2" style='border: none; padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal" align="center" style='text-align: center'>
                                    <span style='font-family: Helvetica; color: black'>Proxy Parameters<o:p></o:p></span></p>
                            </td>
                        </tr>
                        <tr style='mso-yfti-irow: 1'>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <span style='font-family: Helvetica; color: black'>USE_PROXY<o:p></o:p></span></p>
                            </td>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <code><span style='font-size: 10.0pt; color: black'>Proxy will be enabled only when
                                        this set to TRUE.</span></code><span style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                            </td>
                        </tr>
                        <tr style='mso-yfti-irow: 2'>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <span style='font-family: Helvetica; color: black'>PROXY_HOST<o:p></o:p></span></p>
                            </td>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <code><span style='font-size: 10.0pt; color: black'>Proxy Server name or the IP address.</span></code><span
                                        style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                            </td>
                        </tr>
                        <tr style='mso-yfti-irow: 3; mso-yfti-lastrow: yes'>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <span style='font-family: Helvetica; color: black'>PROXY_PORT<o:p></o:p></span></p>
                            </td>
                            <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                                <p class="MsoNormal">
                                    <code><span style='font-size: 10.0pt; color: black'>Proxy Server port.</span></code><span
                                        style='font-family: Helvetica; color: black'><o:p></o:p></span></p>
                            </td>
                        </tr>
                    </table>
                    <p>
                        <span style='font-family: Helvetica; color: black'>Called by <a href="#CallerService">
                            CallerService.php</a>.<o:p></o:p></span></p>
                </td>
            </tr>
        </table>
        <div class="MsoNormal" align="center" style='text-align: center'>
            <span style='font-family: Helvetica; color: black'>
                <hr size="2" width="100%" align="center">
            </span>
        </div>
        <h2>
            <span style='font-family: Helvetica; color: black'>API&nbsp;Documentation<a name="APIDocumentation"
                id="APIDocumentation"></a><o:p></o:p></span></h2>
        <p>
            <span style='font-family: Helvetica; color: black'>The <i>Name-Value Pair API Developer
                Guide and Reference</i> is available in HTML and PDF format.<o:p></o:p></span></p>
        <table class="MsoNormalTable" border="0" cellpadding="0" style='mso-cellspacing: 1.5pt;
            mso-padding-alt: 3.75pt 3.75pt 3.75pt 3.75pt'>
            <tr style='mso-yfti-irow: 0; mso-yfti-firstrow: yes'>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'>HTML<o:p></o:p></span></p>
                </td>
                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'><a href="https://www.paypal.com/en_US/ebook/PP_NVPAPI_DeveloperGuide/index.html">
                            https://www.paypal.com/en_US/ebook/PP_NVPAPI_DeveloperGuide/index.html</a><o:p></o:p></span></p>
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                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
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                        <span style='font-family: Helvetica; color: black'>PDF<o:p></o:p></span></p>
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                <td style='padding: 3.75pt 3.75pt 3.75pt 3.75pt'>
                    <p class="MsoNormal">
                        <span style='font-family: Helvetica; color: black'><a href="https://www.paypal.com/en_US/pdf/PP_NVPAPI_DeveloperGuide.pdf">
                            https://www.paypal.com/en_US/pdf/PP_NVPAPI_DeveloperGuide.pdf</a><o:p></o:p></span></p>
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